Fudge Brownie Pie

Bahan-bahan (9 porsi)

• 1 unbaked Flaky Pie Crust (what I used) or All Butter Pie Crust*
• 1 large egg white, lightly beaten
• 1/2 cup (8 Tbsp; 113g) unsalted butter
• 2 Tablespoons (30ml) vegetable oil or melted coconut oil
• 1 cup (200g) granulated sugar
• 2 large eggs + 1 egg yolk, at room temperature
• 2 teaspoons pure vanilla extract
• 3/4 cup (62g) unsweetened natural or dutch-process cocoa powder
• 1/2 cup (63g) all-purpose flour (spooned & leveled)
• 1/4 teaspoon salt
• 3/4 cup (100g) chopped walnuts
• 3/4 cup (135g) semi-sweet chocolate chips
• optional for serving: ice cream, whipped cream, hot fudge, chocolate syrup